国民财富变化与可持续发展

当代的经济学家认为可持续发展就是创造、保持和管理财富的过程。结合1995~2005年的国民财富变动数据,分析当前世界与中国的国民财富变化特征,可以从变化中对当前世界不同发展程度国家及中国的可持续发展现状做出评价。     

提高欠发达地区高校资金使用效率的几点建议——以江西省普通高校为例

以江西省属普通高校为例,在分析江西高校资金使用现状及存在问题的基础上,对提高欠发达地区高校资金使用效率提出了几点建议,以期为欠发达地区高校财务管理有所裨益。     

Learning equilibrium mean-variance strategy

We study a dynamic mean-variance portfolio optimization problem under the reinforcement learning framework, where an entropy regularizer is introduced to induce exploration. Due to the time–inconsistency involved in a mean-variance criterion, we aim to learn an equilibrium policy. Under an incomplete market setting, we obtain a semi-analytical, exploratory, equilibrium mean-variance policy that turns out to follow a Gaussian distribution. We then focus on a Gaussian mean return model and propose a reinforcement learning algorithm to find the equilibrium policy. Thanks to a thoroughly designed policy iteration procedure in our algorithm, we prove the convergence of our algorithm under mild conditions, despite that dynamic programming principle and the usual policy improvement theorem failing to hold for an equilibrium policy. Numerical experiments are given to demonstrate our algorithm. The design and implementation of our reinforcement learning algorithm apply to a general market setup.     

Are all investment decisions to subscribe to new stocks mindless?Investor heterogeneity and behavior in the process of subscribing to new stocks

The IPO process is a way for companies to improve their corporate governance and for investors to assess company quality.This paper posits that investor choices...     

卖空限制与收益可预测性——A股融资融券制度的证据

基于A股市场融资和融券余额的巨大差距,本文拓展了Hong et al.(2016)的理论模型,在融券端和融资端分别找到了影响股票收益率的变量:融券比率(融券余额/流通市值)和融资回补天数(融资比率/日均换手率)。进一步,本文利用组合价差法和Fama-MacBeth横截面回归法,实证检验了A股市场中融券比率与融资回补天数解释和预测股票收益率的能力。实证结果表明,在存在融券限制条件下,融券比率相比融券回补天数(融券比率/日均换手率)能更好地代表套利者对股票价格高估程度的看法,根据融券比率构建的等权重多空组合能带来月均1.58%的显著收益;而由于融资约束相对较少,融资回补天数相比融资比率(融资余额/流通市值)能更好地代表套利者对股票价格低估程度的看法,根据融资回补天数构建的等权重多空组合能带来月均1.28%的显著收益。实证结果与本文存在融券数量限制下的理论模型相符,且该收益率不能被多因子模型和常规股票特征所解释。     

Dynamic network design for reverse logistics operations under uncertainty

The design of reverse logistics network has attracted growing attention with the stringent pressures from environmental and social requirements. In general, decisions about reverse logistics network configurations are made on a long-term basis and factors influencing such reverse logistics network design may also vary over time. This paper proposes dynamic location and allocation models to cope with such issues. A two-stage stochastic programming model is further developed by which a deterministic model for multiperiod reverse logistics network design can be extended to account for the uncertainties. A solution approach integrating a recently proposed sampling method with a heuristic algorithm is also proposed in this research. A numerical experiment is presented to demonstrate the significance of the developed stochastic model as well as the efficiency of the proposed solution method.     

高校教师按生产要素分配的理论依据及现实意义

本文对按生产要素分配的内涵和特点作出定义 ,对按生产要素分配和按劳分配的关系进行深入的探讨 ,对高校教师按生产要素分配的理论依据进行详尽的阐述 ,对当前高校教师实施按生产要素分配提出建议     

外汇储备增长对我国物价影响的实证分析

2007年以来,我国物价水平出现持续攀升的势头。2008年1～4月份,居民消费价格水平同比上涨8.2%。与物价上涨相对应的是我国外汇储备水平创出了历史新高,截至2008年6月末,我国外汇储备余额达1.8万亿美元。那么,外汇储备增长与物价上涨之间有没有直接的联系?本文从短期和长期两个视角,理论和实证相结合探讨了我国外汇储备增长对物价上涨的影响及其作用机制。     

安钢热连轧低成品库存运行模式创新

合理地降低成品库存是钢铁企业减少资金占用量、降本增效的重要措施之一。以安钢热连轧成品库存为例,对影响成品库存量的因素进行了系统分析,在低成品库存运行模式上进行了研究与创新,并取得了显著成效。     

谈驰名商标“创造”之悖论

驰名商标"创造"的言行有违现行驰名商标制度,是一个悖论。驰名商标"创造"悖论在地方政府和企业的行为上都有明显的体现。驰名商标"创造"悖论导致了驰名商标认定的异化,妨害了正常的商标管理工作秩序,也损害了驰名商标本身的形象。为了解决驰名商标"悖论"问题,需要在驰名商标制度的教育宣传、堵塞驰名商标认定过程中的漏洞、规范驰名商标的使用行为方面采取必要的措施。